bugfix: make sure array is copied before call to callback
bugfix: make sure array is copied before call to callback

anubhavvardhan/qutip,qutip/qutip,cgranade/qutip,cgranade/qutip,qutip/qutip,zasdfgbnm/qutip,anubhavvardhan/qutip,zasdfgbnm/qutip